A high-stakes poker game convinces Nucky Thompson (Steve Buscemi) that New York mobster Arnold Rothstein (Michael Stuhlbarg) and a Florida land deal don’t mix in Episode 40 (“All In”) of “Boardwalk Empire,” recently renewed by HBO for a fifth season.

“What I require is a partner with a level head,” Nucky says when inviting Arnold to invest in Tampa real estate. With water on three sides, the property is ideal for offloading illegal rum shipments from the islands.

But Nucky and Arnold have a troubled history and trust is lacking. That’s why Arnold won’t part with his money until he gets a better grasp of Nucky’s character.

“I find you don’t really know a man until you play cards with him,” Arnold says.

That link is Eddie Kessler (Anthony Laciura), entrusted by Nucky with delivering $10,000 to gangster Ralph Capone (Domenick Lombardozzi). Before Ralph takes the train home to Illinois, he revels in a songfest with Eddie and his German drinking buddies.

“Come to Chicago,” Ralph says to Eddie.

“To new lives, Mr. Capone,” Eddie responds in an exuberant toast.

Eddie’s new life takes an unexpected turn, however, when he’s detained by the feds.